Pipe coupling



W C. COUD.

PIPE COUPLING. APPLICATION FILED sEPT.2.2. I91).

i {1,307,392. H Patefited June 24,1919.

a! aa dr TNT ornate.

WILLIAM 0. com), orBAL'rIMonE, MARYLAND.

PIPE-COUPLING.

' Pipe-Couplings; and I do hereby declarethe' following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to whichappertains to make and usethe same. This invention relates to improvements in pipe couplings. j 4 i The object of this invention is to provide a pipe coupling having a stationary soft inetal'seat between the opposing faces of the sections of the coupling and thereby prevent "leakage v i i A further'object of this invention is to provide a double seat to produce security against leakage should one of the seats become defective. A still further object of this invention is to'provide a. pipe coupling, having aball joint to insure perfect contact, obviating the requirement ofwashe rs, gaskets or the like and to provide a soft metal seat at the point of juncture of thetwo sections, this seat being of differentqnetal than the sections of therjoints to prevent corrosion at this point.

A further object of this invention is to provide a pipe coupling of this character,

' which will be simple, practicalv and comparatively. inexpensive in construction and one that canbe manufactured and soldat a low cost.

With these and other ob ects in view, the

I invention consistsin the novel combination and arrangement of Partshereinafter more fully described and set forth in the claims hereto appended. I

In the drawing,

Figure 1 is a side elevation of the pipe coupling, made in accordance with-this invention, i

Fig. 2 is a vertical longitudinal sectional view of the same,

Fig, 3 is a transverse sectional view of,

one soft metal washer, and

.Fig. 4 is a top plan View of another metal Washer. I

Like numerals of reference designate corresponding parts in all thefigures of the drawings.

Referring to the drawings, the numeral 5 designates the pipe coupling in its entirety and it consists initsc'onstruction of a male Specification of. Letters Eatent. Patented June 24, 1919.

Application filed se ptemberza, 1917. Serial No. 192,717.

section 6 and a female section 7. The female section 7 comprises a cylindrical body 8 provided with the interior screw threads 9 and as at 14. .The male-member comprises a cylindrical body-15 having interior screw threads 16 .One end of the body 15 is provided with an outer annular flange 1T which has an inwardly inclined face 18 which is substantially convex 'in cross section and forms a ball joint so that it may readilyseat'against the. inclined face 14 of the Washer 13 and therebyform a tight joint between themale and female members when in union. It is to'be understood that the washer 13 is to be formed of suitable soft.

metal such as brass, copper orthe like and.-

by virtue of the contact of the hardmetal of the male member and soft metal of the the two joints. j

The flange 17 is provided on its outer side with an. annular recess or groove 19 in which washer 13, corrosion is impossible between is tightly fitted a metal annular washer 20', the purpose of which Will be hereinafter v more fully described. a A coupling nut 2O is provided with intenor screw threads 21: which. are adapted tofit the screw threads 11 on the flangelO I of the femalemember. ,One; end of the couplingnut is provided with an inturned annillar flange 22 which is adapted to overlie the washer 20, whereby when it isthreaded onthe flange 10 of the female and the male and female members are drawn in tight con nection with one another, theflange 22 will blnd against the outer surface of the. washer Y 20, thereby forming a double seat andconsequently preventingleakage should the seat formed by the ball surface 18 andwasher 13 become vrorn out or defective.

As will be notedmore clearly from Fig.

2 of the drawings, the metal washer 20 is of substantial rectangular cross section and the flange 22 of the nut 20 is of similar cross section so that the innerface thereof engages snugly the outer or'u pper surface of the packing ring or washer. When the two sectio of the coupling are forced together by means of the coupling nut, the inclined lower portion 18 of the male member willbe forced tightly into seat or washer 13 so as to form a tight joint therewith. In addition, the washer 20 will be forced tightly into the groove or recess therefor, and a tight joint will be formed between the upper edge of this Washer and the flange of the coupling nut. Also, since the under face of flange 22 ,of the coupling nut is plane, and a slight space is left between the inner edge of this flange and the body of the male member (3, proper centering of the male member so as to insure accurate seating thereof in the washer or seat 13 of the female member is secured, thus obtaining a tight and accurate double oint of comparatively simple construction which is absolutely fluid tight.

From the foregoing description taken in connection with the accompanying drawings it will be apparent that the sections are first placed together, the coupling nut being fitted then over the male member and threaded on the female member until its flange 22 seat and provided adjacent its lower end with an outer annular flange, said flange being provided in its upper face with an an nular recess spaced from the periphery of said upper member, a ring washer mounted in said recess and projecting above said flange, and a coupling nut threaded upon the lower member and provided at its upper end with an inwardly projecting annular flange having its under surface plane and in tight engagement with the upper edge vof the washer and having its inner edge spaced from the periphery of said upper member.

2. In a pipe coupling", a lower coupling member, an upper coupling member fitting into said lower member and provided adja cent its lower end with an outer annular flange having an annular recess in its upper face, a ring washer seated in said recess and projecting above said flange, and a coupling nut threaded upon said lower membe and provided at its upper end with an inwardly projecting annular flange in tight engagement with the upper edge of said washer, said nut providing means for exerting great pressure upon the washer so as to cause slight spreading thereof and effect a. tight closure between the washer and said flange.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM C. CODD.

Witnesses:

\VILLIAM HISSEY, J r., JOHN EARLY Conn. 

